<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper" >
                        <div class="button">{{ this.currentCity }}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item of hotCities" :key="item.id" @click="handleCityClick(item.name)">
                        <div class="button">{{ item.name }}</div>
                    </div>
                </div>
            </div>
            <div class="area" 
            v-for="(item,key) of cities" 
            :key="key"
            :ref="key"
            >
                <div class="title border-topbottom" >{{ key }}</div>
                <div class="item-list">
                    <div class="item border-bottom" v-for="inneritem of item" :key='inneritem.id'
                    @click="handleCityClick(inneritem.name)">{{ inneritem.name }}</div>

                </div>
            </div>
        </div>
    </div>
</template>

<script>
import { click } from '@better-scroll/shared-utils'
import Bscroll from 'better-scroll'
import { mapState } from 'vuex'
export default {
    name: 'CityList',
    props: {
        cities: Object,
        hotCities: Array,
        letter: String
    },
    methods: {
        handleCityClick (city) {
            this.$store.dispatch('changeCity',city)
            this.$router.push('/')
        }
    },
    computed: {
        ...mapState({
            currentCity: 'city'
        })
    },
    watch: {
    cities: function () {
      this.$nextTick(() => {
        this.scroll.refresh()
      })
    },
    letter: function () {
        if(this.letter) {
            const element =this.$refs[this.letter] [0]
            this.scroll.scrollToElement(element)
        }
    }
  },
    mounted () {
        this.scroll =new Bscroll(this.$refs.wrapper)
    }
}
</script>

<style lang="stylus" scoped>
    @import '../../../assets/styles/varibles.styl'
    .border-topbottom
       &:before
           border-color #ccc
       &:after
           border-color #ccc
    .border-bottom
       &:after
           border-color #ccc
    .list
        overflow hidden
        position absolute
        top 1.58rem 
        left 0
        right 0
        bottom 0
        .title
            line-height .54rem
            background #eee
            padding-left .2rem
            color #666
            font-size .26rem
         .button-list
            overflow hidden
            padding .1rem .6rem .1rem .1rem
            .button-wrapper
                float left
                width 33.3%
                .button
                     margin .1rem
                     padding .1rem 0
                     text-align center
                     border .02rem solid  #ccc
         .item-list
             .item
                 line-height .76rem
                 padding-left .2rem
         


</style>